$20.00 for a ballest! Man....can't beat that!

Nice grow so far....pat yourself on the back.
You want to transplant right about now....actually might be alittle late in that respect, but no harm done.
the longer you can wait till switching from VEG. to Bloom the better off if you have the room!...know what I mean?
Sounds like you just bought the bulb...a replacment bulb. You'll need socket commonly called (Mogul socket), ballest...and in most cases the ignitor, and cap. are already wired. If it is of that type, check with an electrical store, lighting store, ect. Ask for these products over the phone...don't make the drive if ya don't have too
also if you go that route, learn to read the diagram on the ballest for wiring.